This is a Foba COARO CL 7.9" (20 cm) Combitube Section. The heart of the Foba Combitube System is the tube itself. This Combitube is made of Nickel Plated Steel with a non-reflective matte surface. Each end has a unique cone connector that allows combining an unlimited number of Combitubes.
Combitubes are available separately in several different lengths. Three different kits are also available, which include connectors, arms, clamps -- virtual Erector Sets for your studio needs: